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/* pinentry.h - The interface for the PIN entry support library.
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Copyright (C) 2002, 2003, 2010, 2015 g10 Code GmbH
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This file is part of PINENTRY.
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PINENTRY is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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PINENTRY is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PINENTRY_H
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#define PINENTRY_H
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#ifdef __cplusplus
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extern "C" {
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#if 0
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}
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#endif
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#endif
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typedef enum {
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PINENTRY_COLOR_NONE, PINENTRY_COLOR_DEFAULT,
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PINENTRY_COLOR_BLACK, PINENTRY_COLOR_RED,
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PINENTRY_COLOR_GREEN, PINENTRY_COLOR_YELLOW,
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PINENTRY_COLOR_BLUE, PINENTRY_COLOR_MAGENTA,
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PINENTRY_COLOR_CYAN, PINENTRY_COLOR_WHITE
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} pinentry_color_t;
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struct pinentry
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{
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/* The window title, or NULL. (Assuan: "SETTITLE TITLE".) */
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char *title;
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/* The description to display, or NULL. (Assuan: "SETDESC
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DESC".) */
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char *description;
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/* The error message to display, or NULL. (Assuan: "SETERROR
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MESSAGE".) */
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char *error;
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/* The prompt to display, or NULL. (Assuan: "SETPROMPT
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prompt".) */
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char *prompt;
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/* The OK button text to display, or NULL. (Assuan: "SETOK
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OK".) */
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char *ok;
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/* The Not-OK button text to display, or NULL. This is the text for
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the alternative option shown by the third button. (Assuan:
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"SETNOTOK NOTOK".) */
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char *notok;
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/* The Cancel button text to display, or NULL. (Assuan: "SETCANCEL
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CANCEL".) */
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char *cancel;
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/* The buffer to store the secret into. */
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char *pin;
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/* The length of the buffer. */
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int pin_len;
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/* Whether the pin was read from an external cache (1) or entered by
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the user (0). */
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int pin_from_cache;
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/* The name of the X display to use if X is available and supported.
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(Assuan: "OPTION display DISPLAY".) */
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char *display;
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/* The name of the terminal node to open if X not available or
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supported. (Assuan: "OPTION ttyname TTYNAME".) */
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char *ttyname;
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/* The type of the terminal. (Assuan: "OPTION ttytype TTYTYPE".) */
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char *ttytype;
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/* The LC_CTYPE value for the terminal. (Assuan: "OPTION lc-ctype
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LC_CTYPE".) */
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char *lc_ctype;
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/* The LC_MESSAGES value for the terminal. (Assuan: "OPTION
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lc-messages LC_MESSAGES".) */
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char *lc_messages;
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/* True if debug mode is requested. */
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int debug;
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/* The number of seconds before giving up while waiting for user input. */
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int timeout;
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/* True if caller should grab the keyboard. (Assuan: "OPTION grab"
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or "OPTION no-grab".) */
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int grab;
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/* The window ID of the parent window over which the pinentry window
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should be displayed. (Assuan: "OPTION parent-wid WID".) */
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int parent_wid;
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/* The name of an optional file which will be touched after a curses
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entry has been displayed. (Assuan: "OPTION touch-file
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FILENAME".) */
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char *touch_file;
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/* The frontend should set this to -1 if the user canceled the
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request, and to the length of the PIN stored in pin
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otherwise. */
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int result;
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/* The frontend should set this if the NOTOK button was pressed. */
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int canceled;
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/* The frontend should set this to true if an error with the local
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conversion occured. */
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int locale_err;
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/* The frontend should set this to a gpg-error so that commands are
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able to return specific error codes. This is an ugly hack due to
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the fact that pinentry_cmd_handler_t returns the length of the
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passphrase or a negative error code. */
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int specific_err;
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/* The frontend should set this to true if the window close button
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has been used. This flag is used in addition to a regular return
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value. */
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int close_button;
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/* The caller should set this to true if only one button is
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required. This is useful for notification dialogs where only a
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dismiss button is required. */
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int one_button;
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/* If true a second prompt for the passphrase is shown and the user
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is expected to enter the same passphrase again. Pinentry checks
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that both match. (Assuan: "SETREPEAT".) */
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char *repeat_passphrase;
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/* The string to show if a repeated passphrase does not match.
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(Assuan: "SETREPEATERROR ERROR".) */
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char *repeat_error_string;
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/* Set to true if the passphrase has been entered a second time and
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matches the first passphrase. */
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int repeat_okay;
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/* If this is not NULL, a passphrase quality indicator is shown.
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There will also be an inquiry back to the caller to get an
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indication of the quality for the passphrase entered so far. The
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string is used as a label for the quality bar. (Assuan:
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"SETQUALITYBAR LABEL".) */
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char *quality_bar;
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/* The tooltip to be show for the qualitybar. Malloced or NULL.
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(Assuan: "SETQUALITYBAR_TT TOOLTIP".) */
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char *quality_bar_tt;
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/* For the curses pinentry, the color of error messages. */
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pinentry_color_t color_fg;
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int color_fg_bright;
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pinentry_color_t color_bg;
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pinentry_color_t color_so;
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int color_so_bright;
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/* Malloced and i18ned default strings or NULL. These strings may
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include an underscore character to indicate an accelerator key.
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A double underscore represents a plain one. */
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/* (Assuan: "OPTION default-ok OK"). */
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char *default_ok;
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/* (Assuan: "OPTION default-cancel CANCEL"). */
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char *default_cancel;
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/* (Assuan: "OPTION default-prompt PROMPT"). */
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char *default_prompt;
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/* (Assuan: "OPTION default-pwmngr
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SAVE_PASSWORD_WITH_PASSWORD_MANAGER?"). */
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char *default_pwmngr;
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/* Whether we are allowed to read the password from an external
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cache. (Assuan: "OPTION allow-external-password-cache") */
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int allow_external_password_cache;
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/* We only try the cache once. */
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int tried_password_cache;
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/* A stable identifier for the key. (Assuan: "SETKEYINFO
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KEYINFO".) */
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char *keyinfo;
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/* Whether we may cache the password (according to the user). */
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int may_cache_password;
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/* NOTE: If you add any additional fields to this structure, be sure
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to update the initializer in pinentry/pinentry.c!!! */
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/* For the quality indicator we need to do an inquiry. Thus we need
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to save the assuan ctx. */
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void *ctx_assuan;
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};
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typedef struct pinentry *pinentry_t;
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/* The pinentry command handler type processes the pinentry request
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PIN. If PIN->pin is zero, request a confirmation, otherwise a PIN
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entry. On confirmation, the function should return TRUE if
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confirmed, and FALSE otherwise. On PIN entry, the function should
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return -1 if an error occured or the user cancelled the operation
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and 1 otherwise. */
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typedef int (*pinentry_cmd_handler_t) (pinentry_t pin);
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/* Start the pinentry event loop. The program will start to process
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Assuan commands until it is finished or an error occurs. If an
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error occurs, -1 is returned and errno indicates the type of an
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error. Otherwise, 0 is returned. */
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int pinentry_loop (void);
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/* The same as above but allows to specify the i/o descriptors.
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* infd and outfd will be duplicated in this function so the caller
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* still has to close them if necessary.
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*/
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int pinentry_loop2 (int infd, int outfd);
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/* Convert the UTF-8 encoded string TEXT to the encoding given in
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LC_CTYPE. Return NULL on error. */
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char *pinentry_utf8_to_local (const char *lc_ctype, const char *text);
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/* Convert TEXT which is encoded according to LC_CTYPE to UTF-8. With
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SECURE set to true, use secure memory for the returned buffer.
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Return NULL on error. */
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char *pinentry_local_to_utf8 (char *lc_ctype, char *text, int secure);
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/* Run a quality inquiry for PASSPHRASE of LENGTH. */
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int pinentry_inq_quality (pinentry_t pin,
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const char *passphrase, size_t length);
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/* Try to make room for at least LEN bytes for the pin in the pinentry
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PIN. Returns new buffer on success and 0 on failure. */
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char *pinentry_setbufferlen (pinentry_t pin, int len);
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/* Use the buffer at BUFFER for PIN->PIN. BUFFER must be NULL or
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allocated using secmem_alloc. LEN is the size of the buffer. If
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it is unknown, but BUFFER is a NUL terminated string, you pass 0 to
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just use strlen(buffer)+1. */
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void pinentry_setbuffer_use (pinentry_t pin, char *buffer, int len);
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/* Initialize the secure memory subsystem, drop privileges and
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return. Must be called early. */
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void pinentry_init (const char *pgmname);
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/* Return true if either DISPLAY is set or ARGV contains the string
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"--display". */
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int pinentry_have_display (int argc, char **argv);
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/* Parse the command line options. May exit the program if only help
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or version output is requested. */
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void pinentry_parse_opts (int argc, char *argv[]);
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/* The caller must define this variable to process assuan commands. */
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extern pinentry_cmd_handler_t pinentry_cmd_handler;
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#ifdef HAVE_W32_SYSTEM
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/* Windows declares sleep as obsolete, but provides a definition for
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_sleep but non for the still existing sleep. */
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#define sleep(a) _sleep ((a))
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#endif /*HAVE_W32_SYSTEM*/
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#if 0
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{
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* PINENTRY_H */
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